143664665 has 16 divisors (see below), whose sum is σ = 176781312. Its totient is φ = 112029504.

The previous prime is 143664659. The next prime is 143664707. The reversal of 143664665 is 566466341.

It is a cyclic number.

It is not a de Polignac number, because 143664665 - 2⁴ = 143664649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63992 + ... + 66198.

It is an arithmetic number, because the mean of its divisors is an integer number (11048832).

Almost surely, 2^143664665 is an apocalyptic number.

It is an amenable number.

143664665 is a deficient number, since it is larger than the sum of its proper divisors (33116647).

143664665 is a wasteful number, since it uses less digits than its factorization.

143664665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536.

The product of its digits is 311040, while the sum is 41.

The square root of 143664665 is about 11986.0195644759. The cubic root of 143664665 is about 523.7410985741.

The spelling of 143664665 in words is "one hundred forty-three million, six hundred sixty-four thousand, six hundred sixty-five".